for self-driving cars -- yes, we said self-driving cars, california governor jerry brown called those science fiction becoming tomorrow's reality. >> they're closer to becoming reality than you think. abc's jim avila has taken one for a test drive. >> reporter: you've seen this, cars that slam on the brakes before you hit a pole. but here's something you have never seen. the car of the future. making the driver totally unnecessary. no hands. google's working on one. and the federal government is sponsoring a field test in ann arbor, michigan. with cars that automatically swerve past accidents and alert you to oncoming hazards. now, this at general motors test track. i sat in the driver's seat when this car stayed in its lane. it stopped on its own when a car driving 30 miles an hour slower, pulled in front of us. >> we can see the day when cars avoid collisions. >> reporter: it's on a dream, since george jetson sat in his flying car. >> the vehicle can take complete control and take you to your destination in comfort and safety and security. >> reporter: this prototype used radar, cameras and